Rivet-set retainer



" latter by Patented Apr. I3, 1926.

AXEL LEVEDAHL, OF AURORA, ILLINOIS,

PATENT OFFICE.

ASSIGNOR TO INDEPENDENT PNEUMATIC TOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

RIVET-SET RETAINER.

.Application filed September 23, 1921. Serial No. 502,763.

)"0 all whom 'it may concern .Be it known that I,AXnLL1:vED.-\Hr.,a citizen of the United States, residing at Aurora, in the count-y of Kane and State of Illinois, have invented new and-useful Improvements in Rivet-Set Retainers, of which the following is a specification.

This invention relates to rivet set retainers for pneumatic hammers and like tools.

One object of my invention is to provide means for non-yieldably holding the retainer engaged `with the set so that the retainer cannot spread or open up to release the set in case the tool is operated while out of contact with the work, and thus prevent shooting the set out of the barrel. A further object of the invention is to inake the retainer of a plurality of longitudinal sections which when placed together about the barrel and set form a complete retainer.

A still further object ofthe invention is to lock thesections of the retainer together about the set and barrel and also on the locking rings surrounding such parts. Y Y

The invention consists further-in the matters hereinafter described and more particularly set forth in the appended claims.

In the accompanying drawings- Fig. l is a side elevational view of a pneumatic hammer having a rivet set retainer of my invention applied to the forward end of the barrel;

Fig. 2 is an enlarged longitudinal vertical sectional view taken through theV for'- ward end of the barrel and the rivet set retainer;

Figs. 3 and 4 are transverse vertical sectional views taken on lines 3 3 and lr-4, respectively, of Fig. 2; and

Fig. 5 is a side elevationalview illustrating the manner in which the retainer is applied to and removed from the barrel.

In the drawings, l indicates the barrel of a pneumatic hammer having applied to its forward end a retainer 2 constructed in accordance with my invention and serving to hold at the forward end of the barrel a rivet set 3 of the usual construction.

The retainer 2 is made tubular in shape to fit about the forward end of the barrel and engage the set 3 in an annular groove 43, as shown in the drawings. Said retainer 2, in the formshown, is divided longitudinally vinto two half sections 5 and 6, .both made alike. directed vinward toward the set 3 and curved to engage 1n said annular groove 4. Each section 5, 6 is-also provided at its forward end with a semicircular fiange 7. These flanges extend radially outward and when the sections 5, 6` are placed about the barrel and set provide an outwardly opening annular groove 8 behind them to accommodate a solid locking ring l0, which has an inside diameter less than the flanges.

Adjacent ythe meeting edges of thesections- 5, 6, the circular contour of the fianges i", 7 is flattened, as at ll, Il to permit said ring l0 to pass over the fianges in applying the retainer and removing `the same from the barrel 1t.v f v The retainer is applied to the barrelil in the .following manner. One of the retainer sections-for example, the one G-is applied against the barrel with its forward end to engage in the groove 'e of the set 3 when the latter is inserted in the barrel. The lockingring 10 is-next slipped over the iiange 7 oif the section 6, .this being permitted Mby the flattened portions l1, 11 at the sides ofthe flange. The set 3 is then inserted into the The forward end of each section isv end of the barrel 1 until stopped by its flange 3a contaetingwith'the forward end of the barrel, as shown in Fig. 2.I The othersection 5 is then applied in vplace by first inserting its forward hanged end under the ring 3.0 in the manner shown in Fig. 5. This passes the flange 7 through the ring l0, whereupon the section 5 is brought against the barrel to cause the ring 10 seatin the groove 8 to the rear of the flanges 7, 7 and be held in place by the same. holds the sections 5, 6 together at the forward end of the retainer and being solidi or unbroken locks the forward end of the retainer positively about and in `Contact with the set 3. l

Each section 5, 6 is provided "at its rear end with an inwardly extending flange 1Q.. These flanges extend into an annular groove 13 provided in the barrel. This groove is considerably wider than the flanges-12, l2 and allows for a certain longitudinal movement of the retainer and set 3 relatively lto ihe barrel. f

For holding the inner ends of the sections 5, 6 together and-about the barrel, I provide a splitlocking ring 14. This is .made annu- The ring 10 lar and of spring steel and is snapped over the rear end of the retainer for holding` its Sections 5 and 6 on the barrel. Said ring lll has an inturiied forward flange 15 to engage in grooves 16 in the sections 5, 6, as shown. The ring 1-t also has an inturned rear flange 1T engaging over the rear ends of the sections, as shown in Fig. 2, for the purpose of holding the locking clip or ring 1l against lateral displacement.

The locking ring 10 being solid, that is, continuous and unbroken throughout', forms a positive and unyielding lock forv the retainer about the set 3 and will not open up or spread to allow the flange .3 to pass, and thus prevents the set from being shot out of the barrel should the tool be operated while raised from the work. This provides a safety feature not possessed by retainers which have only a yielding or resilient engagement with the set.

As shown in the drawings, the retainer 2 fits about and enga-ges the barrel 1. This contact is increased by the spring clip 14,

Y with the result that the retainer 2 does not fall down or move with the set 3 at each stroke of the hammer but appears Heating. In riveting, the solid ring 10 takes the blunt of the strain, thus relieving the retainer body of much of the blows.

While I have shown and described herein in detail a rivet Set retainer embodying the features of my invention, it is of course to be understood that the details of construe-- r tion and arrangement of parts shown may engagement with the set.

2. The combination with the barrel of a pneumatic hammer and a rivet set at the forward end of said barrel, of a tubular rivet set retainer surrounding said barrel and set and engaging both of the same, said retainer being divided longitudinally, a resilient clip member clamping the retainer on the barrel. and a solid ring encircling the outer end of the retainer for holdingthe same in nonyielding engagement with the set.

3. The combination with the barrel of a pneumatic hammer and a rivet set at the forward end of said barrel, of a tubular rivet set retainer surrounding the barrel and set. said retainer comprising a plurality of separable longitudinal sections engaging the barrel and the set., means for holding the sections on the barrel, and a solid looking ring encirclino` the portions of the sections about the set ror holding the saine in nonyielding engagement therewith.

4. The combination with the barrel of a pneumatic hammer and a rivet set at the forward end of said barrel, of a tubular rivet set retainer surrounding the barrel and set, said retainer comprising' a plurality of separable longitudinal sections encircling the bari'el and set and engaging the same, a resilient clip member encircling the portions of the sections about the barrel for holding the sections thereon, and a solid locking ring encircling the portions of the sections about the set for holding' the sections in non-yielding engagement therewith.

5. The combination with the barrel of a pneumatic hammer and a rivet set at the iforward end of said barrel, ofa tubular rivet set retainer surrounding the barrel and set, said retainer comprising a plurality of separable longitudinal sections encircling the barrel and set and engaging the same, means for detachably clamping the rear ends of the sections on the barrel, said sections having their outer ends engaging' the set and provided with outwardly extending flanges, and a solid locking ring surroundingl the forward ends of the sections to the rear of Said flanges for holding the sections engaged with the set, said fiang'es having flattened portions to permit the ring to be passed over said flanges.

6. The combination with the barrel of a pneumatic hammer and a rivet set at the forward end of said barrel, of a tubular rivet set retainer encircling the barrel and set, said retainer comprising a plurality of separable `longitudinal sections encircling' the barrel and set and engaging the same, a resilient clip engaging the rear ends of the sections for holdingthe saine on the bairel, and a solid locking ring engaging the forward ends of the sections for holding` the same engaged with said set, 'said sections having inturned flanges at their inner ends and extending into an annular groove in the barrel.

7. The combination with the barrel of a pneumatic hammer and a rivet set at the forward end of said barrel, of a. tubular rivet set retainer surrounding` the barrel and set, said retainer comprising a plurality of separable longitudinal sections encircling the barrel and set and engaging` the same, a resilient clip encircling the sections adjacent their inner ends for holding the sections on the barrel, said sections having iiiturned flanges at their inner ends extending into an annular groove in the barrel, said groove being wider than said flanges, said sections having their forward ends directed inward and outward to engage in an annular groove in said set, and a solid locking ring encircling the forward ends of the Sections for holding` the same in the groove of said set.

8. The combination with the barrel of a pneumatic hammer and a rivet Set at the forward end of said barrel, of a tubular rivet set retainer surrounding the barrel and set, Said retainer fitting tightly about said barrel and having an inturned iange at its 10 inner end extending into an annular groove in said barrel, Said groove being- Wider than said flange, means for clamping said retainer on Said barrel, and a Solid ring encircling the forward end of the retainer for holding the same in a groove of said set.

In testimony that I claim the foregoing as my invention, I aliix my signature, this 20th day of SeptembenvA. D. 1921.

AXEL LEVEDAHL. 

